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-rw-r--r--fs/sysfs/bin.c259
1 files changed, 0 insertions, 259 deletions
diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c
deleted file mode 100644
index 006fc64227d..00000000000
--- a/fs/sysfs/bin.c
+++ /dev/null
@@ -1,259 +0,0 @@
-/*
- * fs/sysfs/bin.c - sysfs binary file implementation
- *
- * Copyright (c) 2003 Patrick Mochel
- * Copyright (c) 2003 Matthew Wilcox
- * Copyright (c) 2004 Silicon Graphics, Inc.
- * Copyright (c) 2007 SUSE Linux Products GmbH
- * Copyright (c) 2007 Tejun Heo <teheo@suse.de>
- *
- * This file is released under the GPLv2.
- *
- * Please see Documentation/filesystems/sysfs.txt for more information.
- */
-
-#undef DEBUG
-
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/kernel.h>
-#include <linux/kobject.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/mutex.h>
-
-#include <asm/uaccess.h>
-
-#include "sysfs.h"
-
-struct bin_buffer {
- struct mutex mutex;
- void *buffer;
- int mmapped;
-};
-
-static int
-fill_read(struct dentry *dentry, char *buffer, loff_t off, size_t count)
-{
- struct sysfs_dirent *attr_sd = dentry->d_fsdata;
- struct bin_attribute *attr = attr_sd->s_bin_attr.bin_attr;
- struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
- int rc;
-
- /* need attr_sd for attr, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
- return -ENODEV;
-
- rc = -EIO;
- if (attr->read)
- rc = attr->read(kobj, attr, buffer, off, count);
-
- sysfs_put_active_two(attr_sd);
-
- return rc;
-}
-
-static ssize_t
-read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off)
-{
- struct bin_buffer *bb = file->private_data;
- struct dentry *dentry = file->f_path.dentry;
- int size = dentry->d_inode->i_size;
- loff_t offs = *off;
- int count = min_t(size_t, bytes, PAGE_SIZE);
-
- if (size) {
- if (offs > size)
- return 0;
- if (offs + count > size)
- count = size - offs;
- }
-
- mutex_lock(&bb->mutex);
-
- count = fill_read(dentry, bb->buffer, offs, count);
- if (count < 0)
- goto out_unlock;
-
- if (copy_to_user(userbuf, bb->buffer, count)) {
- count = -EFAULT;
- goto out_unlock;
- }
-
- pr_debug("offs = %lld, *off = %lld, count = %d\n", offs, *off, count);
-
- *off = offs + count;
-
- out_unlock:
- mutex_unlock(&bb->mutex);
- return count;
-}
-
-static int
-flush_write(struct dentry *dentry, char *buffer, loff_t offset, size_t count)
-{
- struct sysfs_dirent *attr_sd = dentry->d_fsdata;
- struct bin_attribute *attr = attr_sd->s_bin_attr.bin_attr;
- struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
- int rc;
-
- /* need attr_sd for attr, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
- return -ENODEV;
-
- rc = -EIO;
- if (attr->write)
- rc = attr->write(kobj, attr, buffer, offset, count);
-
- sysfs_put_active_two(attr_sd);
-
- return rc;
-}
-
-static ssize_t write(struct file *file, const char __user *userbuf,
- size_t bytes, loff_t *off)
-{
- struct bin_buffer *bb = file->private_data;
- struct dentry *dentry = file->f_path.dentry;
- int size = dentry->d_inode->i_size;
- loff_t offs = *off;
- int count = min_t(size_t, bytes, PAGE_SIZE);
-
- if (size) {
- if (offs > size)
- return 0;
- if (offs + count > size)
- count = size - offs;
- }
-
- mutex_lock(&bb->mutex);
-
- if (copy_from_user(bb->buffer, userbuf, count)) {
- count = -EFAULT;
- goto out_unlock;
- }
-
- count = flush_write(dentry, bb->buffer, offs, count);
- if (count > 0)
- *off = offs + count;
-
- out_unlock:
- mutex_unlock(&bb->mutex);
- return count;
-}
-
-static int mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct bin_buffer *bb = file->private_data;
- struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
- struct bin_attribute *attr = attr_sd->s_bin_attr.bin_attr;
- struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
- int rc;
-
- mutex_lock(&bb->mutex);
-
- /* need attr_sd for attr, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
- return -ENODEV;
-
- rc = -EINVAL;
- if (attr->mmap)
- rc = attr->mmap(kobj, attr, vma);
-
- if (rc == 0 && !bb->mmapped)
- bb->mmapped = 1;
- else
- sysfs_put_active_two(attr_sd);
-
- mutex_unlock(&bb->mutex);
-
- return rc;
-}
-
-static int open(struct inode * inode, struct file * file)
-{
- struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
- struct bin_attribute *attr = attr_sd->s_bin_attr.bin_attr;
- struct bin_buffer *bb = NULL;
- int error;
-
- /* binary file operations requires both @sd and its parent */
- if (!sysfs_get_active_two(attr_sd))
- return -ENODEV;
-
- error = -EACCES;
- if ((file->f_mode & FMODE_WRITE) && !(attr->write || attr->mmap))
- goto err_out;
- if ((file->f_mode & FMODE_READ) && !(attr->read || attr->mmap))
- goto err_out;
-
- error = -ENOMEM;
- bb = kzalloc(sizeof(*bb), GFP_KERNEL);
- if (!bb)
- goto err_out;
-
- bb->buffer = kmalloc(PAGE_SIZE, GFP_KERNEL);
- if (!bb->buffer)
- goto err_out;
-
- mutex_init(&bb->mutex);
- file->private_data = bb;
-
- /* open succeeded, put active references */
- sysfs_put_active_two(attr_sd);
- return 0;
-
- err_out:
- sysfs_put_active_two(attr_sd);
- kfree(bb);
- return error;
-}
-
-static int release(struct inode * inode, struct file * file)
-{
- struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
- struct bin_buffer *bb = file->private_data;
-
- if (bb->mmapped)
- sysfs_put_active_two(attr_sd);
- kfree(bb->buffer);
- kfree(bb);
- return 0;
-}
-
-const struct file_operations bin_fops = {
- .read = read,
- .write = write,
- .mmap = mmap,
- .llseek = generic_file_llseek,
- .open = open,
- .release = release,
-};
-
-/**
- * sysfs_create_bin_file - create binary file for object.
- * @kobj: object.
- * @attr: attribute descriptor.
- */
-
-int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr)
-{
- BUG_ON(!kobj || !kobj->sd || !attr);
-
- return sysfs_add_file(kobj->sd, &attr->attr, SYSFS_KOBJ_BIN_ATTR);
-}
-
-
-/**
- * sysfs_remove_bin_file - remove binary file for object.
- * @kobj: object.
- * @attr: attribute descriptor.
- */
-
-void sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr)
-{
- sysfs_hash_and_remove(kobj->sd, attr->attr.name);
-}
-
-EXPORT_SYMBOL_GPL(sysfs_create_bin_file);
-EXPORT_SYMBOL_GPL(sysfs_remove_bin_file);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 06:37:20 +0000